Around the globe, Isau (Isau 
) is quite a common gender-neutral given name. The given name Isau is habitual in Antigua and Barbuda, where it is quite a common male name, Nigeria, where it is quite a rare unisex name, and Guatemala, where it is a rare male name. Measured by absolute frequency, the name is most common in Nigeria, India, and Mexico. Also, Isau is the last name as well as the forename.